First, we computer folk had the terms software and hardware, then firmware, then a number of other -ware terms came into usage, such as freeware, shareware, vaporware and others. To add to the ever-growing list of -ware terms, I would like to propose this one: Vacuumware: n, software which was written specifically to fill a void in the industry, especially software which is successful more due to how well it fills that void than due to anything else, like usability or utility. I believe it may have been Dennis Ritchie who said (about X) "Sometimes when you fill a vacuum, it still sucks." X is a prime example of vacuumware, and in fact inspired the term.
(From the "Rest" of RHF)